A colourful bunch of roses (NGC 2237-9)

[GordonH]

Hi all

As usual the weather has turned to wet and cloudy and a bout of laryngitis means that I have been able to catch up with some processing and also to have a go at a bit of experimentation. A couple of weeks ago when I captured the Ha data for my Horsehead image I also managed to capture an hour each of Ha, OIII and SII in 10 minute unguided subframes for the Rosette nebula (NGC 2237-9,46) so first of all I did an image using the HST palette of SII for red, Ha for green and OIII for blue using the Ha data for the luminance layer as well. After I procesed it I thought I'd see what the results would be if I swapped the palette around a bit and I think I got slightly carried away. Any way the results are below in the following order

1. HST palette --- SII=R Ha=G OIII=B

2. Reverse HST palette --- OIII=R Ha=G SII=B

3. CFHT (Canada France Hawaii Telescope) palette --- Ha=R OIII=G SII=B

4. Unconventional palette (I used it before on the Crescent nebula) --- Ha=R OIII=G OIII=B

Hope you like them and thanks for looking

All the images used the same Ha data as a luminance channel and all 4 images were processed at the same time to ensure the same processing was used for each one. Details of equipment used can be found on my website http://www.imagingtheheavens.co.uk

Best wishes

Gordon

[Psychobilly]

Very nice Gordon

... hard to choose the one I like the best... I'm like a kid in the sweet shop acnt decide on lemon and lime, Blackcurrant and apple, Fruit salad or strabewrries and cream...can I have some of each ?

Billy...

[narrowbandpaul]

fantastic gordon....a phrase I often use to describe your NB images

nice to see a range of colour palettes...

the HST palette seems very green...was the S[iI] particularly faint

I think the CFHT palette looks best...Ha O[iII] S[iI]

are there plans to acquire more subs?

Super results, and I am sure Richard will be well pleased

Best Wishes

Paul

[barkis]

Well I can't, and would not wish to chose anyone over the others. They are all superbly captured and processed.

This is a magnificent object, and it is very interesting to see it in NB produced colours.

We might never have seen them if that throat bug had not got you Gordon.

Superb work indeed.

Ron.

[LostNSpace]

4 great images Gordon......

Mark

[NickH]

Excellent all of them, but were I to pick two, it would be reverse HST and CFHT

[MartinB]

Lovely detailed Rosette Gordon, I like the last one best.

TBH I think this illustrates the problem with 3 channel narrow band imaging, in this country at least. You either don't push the Ha in which case it contributes next to nothing and you would have been better off collection more OIII and Ha, or, you push the SII really hard, add noise to the image and get a colour cast in the background and stars. I would be interested to see an Ha OIII with a synthetic green channel. I think it would look very similar to the 4th image.